Measurement of the production of high-pT electrons from heavy-flavour hadron decays in Pb-Pb collisions at √sNN=2.76 TeV

Jaroslav Adam,D. Adamová,M. M. Aggarwal,G. Aglieri Rinella,Michelangelo Agnello,N. Agrawal,Z. Ahammed,S. Ahmad,Sang Un Ahn,S. Aiola,A. Akindinov,Sk Noor Alam,D. S. D. Albuquerque,Dimitry Aleksandrov,Bruno Alessandro,D. Alexandre,R Alfaro-Molina,A. Alici,A. Alkin,J. Alme,T. Alt,S. Altinpinar,I. Altsybeev,C. Alves Garcia Prado,M. An,C. Andrei,Harry Arthur Andrews,A. Andronic,V. Anguelov,Christopher Daniel Anson,T. Antiäiä,F. Antinori,P. Antonioli,Rafay Anwar,L. Aphecetche,H. Appelshã¤user,S. Arcelli,R. Arnaldi,O. W. Arnold,Ionut Cristian Arsene,M. Arslandok,B. Audurier,A. Augustinus,R. Averbeck,M. D. Azmi,A. Badalà,Y. W. Baek,S. Bagnasco,R. Bailhache,R. Bala,S. Balasubramanian,A. Baldisseri,R. C. Baral,A. M. Barbano,R. Barbera,F. Barile,G. G. Barnafã¶ldi,Lee Stuart Barnby,V. Barret,P. Bartalini,K. Barth,J. Bartke,E. Bartsch,M. Basile,N. Bastid,S. Basu,B. Bathen,G. Batigne,A. Batista Camejo,B. Batyunya,P. C. Batzing,I. G. Bearden,H. Beck,C. Bedda,N. K. Behera,I. Belikov,F. Bellini,H. Bello Martinez,R. Bellwied,Lucina Gabriela Espinoza Beltran,V. Belyaev,G. Bencedi,S. Beole,A. Bercuci,Y. Berdnikov,Daniel Berenyi,R. A. Bertens,D Berzano,L. Betev,A. Bhasin,I. R. Bhat,A. K. Bhati,B. Bhattacharjee,J. Bhom,L. Bianchi,N. Bianchi,C. Bianchin,J. Bieläã­kovã¡,A. Bilandzic,G. Biro,R. Biswas,S. Biswas,S. Bjelogrlic,J. T. Blair,D. Blau,C. Blume,F. Bock,A. Bogdanov,L. Boldizsã¡r,M. Bombara,M. Bonora,J. Book,H. Borel,A. Borissov,M. Borri,E. Botta,C. Bourjau,P. Braun Munzinger,M. Bregant,T. A. Broker,T. A. Browning,M. Broz,E. Brucken,E. Bruna,G. Bruno,D. Budnikov,H. Buesching,S. Bufalino,P. Buhler,Sergio Arturo Iga Buitron,P. Buncic,O. Busch,Z. Buthelezi,J. Butt,J. T. Buxton,J. Cabala,D. Caffarri,H. Caines,A. Caliva,E. Calvo Villar,P. Camerini,F. Carena,W. Carena,F. Carnesecchi,J. Castillo Castellanos,A. Castro,E. A. R. Casula,C. Ceballos Sanchez,J. Cepila,P. Cerello,J. Cerkala,B. Chang,S. Chapeland,M. Chartier,J. L. Charvet,S. Chattopadhyay,A. Chauvin,V. Chelnokov,M. Cherney,C. Cheshkov,B. Cheynis,V. Chibante Barroso,D. D. Chinellato,S. Cho,P. Chochula,K. Choi,M. Chojnacki,S. Choudhury,P. Christakoglou,C. H. Christensen,P. Christiansen,T. Chujo,S. U. Chung,C. Cicalo,L. Cifarelli,F. Cindolo,J. Cleymans,F. Colamaria,D. Colella,A. Collu,Marco Colocci,G. Conesa Balbastre,Z. Conesa del Valle,M. E. Connors,J. G. Contreras,T. M. Cormier,Yasser Corrales Morales,I. CortÃ©s Maldonado,P. Cortese,M. R. Cosentino,F. Costa,J. Crkovskã,P. Crochet,R. Cruz Albino,E. Cuautle,L. Cunqueiro,T. Dahms,A. Dainese,Meike Charlotte Danisch,A. Danu,D. Das,I. Das,Supriya Das,A. Dash,S. Dash,S. De,A. De Caro,G. de Cataldo,C. de Conti,J. de Cuveland,A. De Falco,D. De Gruttola,N. De Marco,S. De Pasquale,R. D. De Souza,A. Deisting,A. Deloff,C. Deplano,P. Dhankher,D. Di Bari,A. Di Mauro,P. Di Nezza,B. Di Ruzza,M. A. Diaz Corchero,T. Dietel,P. Dillenseger,R. Divià,Ã. . Djuvsland,A. Dobrin,D. Domenicis Gimenez,B. Dã¶nigus,O. Dordic,T. Drozhzhova,A. K. Dubey,A. 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Measurement of the production of high-pT electrons from heavy-flavour hadron decays in Pb-Pb collisions at √sNN=2.76 TeV

2017

Abstract Electrons from heavy-flavour hadron decays (charm and beauty) were measured with the ALICE detector in Pb–Pb collisions at a centre-of-mass of energy s NN = 2.76 TeV . The transverse momentum ( p T ) differential production yields at mid-rapidity were used to calculate the nuclear modification factor R AA in the interval 3 p T 18 GeV/ c . The R AA shows a strong suppression compared to binary scaling of pp collisions at the same energy (up to a factor of 4) in the 10% most central Pb–Pb collisions. There is a centrality trend of suppression, and a weaker suppression (down to a factor of 2) in semi-peripheral (50–80%) collisions is observed. The suppression of electrons in this broad p T interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb–Pb collisions at LHC.

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